The goal set in January was 12 boarders per hour. The free trolley had 12 stops along Scottsdale Road to Frank Lloyd Wright Boulevard and east to WestWorld. It also stopped at some Scottsdale resorts, restaurants, entertainment venues and shopping centers.

It costs about $180,000 to operate the trolley for 90 days. The city and sponsoring businesses shared the cost.

Spring-training games boosted trolley ridership significantly, Clemann said. For the 19 home games of the San Francisco Giants, which train at Scottsdale Stadium, the ridership goal was met for 75 percent of those days, she said.

"Being a first-year service, the data indicates the goal could be met overall in a second year as the route becomes an expected and established service," the trolley summary report states.

For next year, Clemann suggested starting the trolley on Jan. 1 to capture tourists who are in town for college football bowl games, such as the Fiesta Bowl, and to continue to solicit sponsors later this year.

Ending the trolley service at 10 p.m. instead of midnight would lower costs, Clemann said.

It cost $60 an hour to hire a driver from 10 p.m. to midnight, compared with the 10:30 a.m. to 10 p.m. cost of $35 per hour.